UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                  SCHEDULE 13G


                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)

                       Superconductor Technologies, Inc.
           460 Ward Street, Suite F, Santa Barbara CA 93111-2310    
- -------------------------------------------------------------------------------
                               (Name of Issuer)

                                 Common Stock
   -------------------------------------------------------------------------   
                        (Title of Class of Securities)

                                  867931107
         -------------------------------------------------------------
                                (CUSIP Number)



Check the following box if a fee is being paid with the statement [_]. (A fee is
not required only if the reporting person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

 
                                  SCHEDULE 13G

 
 ----------------------------                        --------------------------
 CUSIP No. 8676931107                                 Page 2 of 5 Pages
 ----------------------------                        --------------------------
- --------------------------------------------------------------------------------
 1     NAME OF REPORTING PERSON
       S.S. OR I.R.S IDENTIFICATION NO. OF ABOVE PERSON
       Lockheed Martin Corporation as successor in interest to Lockheed 
       Corporation
       I.R.S. Employer Identification No. 52-1893632
- --------------------------------------------------------------------------------
 2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*              (a)[_]
        (b)[_]
           NOT APPLICABLE
- --------------------------------------------------------------------------------
 3     SEC USE ONLY

- --------------------------------------------------------------------------------
 4     CITIZENSHIP OR PLACE OF ORGANIZATION
 
           Maryland
- --------------------------------------------------------------------------------
                            5  SOLE VOTING POWER
         NUMBER OF             619,047
          SHARES            ----------------------------------------------------
       BENEFICIALLY         6  SHARED VOTING POWER
         OWNED BY              0
           EACH             ----------------------------------------------------
         REPORTING          7  SOLE DISPOSITIVE POWER 
          PERSON               619,047
           WITH             ----------------------------------------------------
                            8  SHARED DISPOSITIVE POWER
                               0   
- --------------------------------------------------------------------------------
 9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       619,047
- --------------------------------------------------------------------------------
 10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES  [_]
- --------------------------------------------------------------------------------
 11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
       10%
- --------------------------------------------------------------------------------
 12    TYPE OF REPORTING PERSON
       CO
- --------------------------------------------------------------------------------
 
                  *SEE  INSTRUCTIONS  BEFORE   FILLING  OUT!

 
                                 SCHEDULE 13G
                                 ------------
                                Amendment No. 1
                                ---------------



 Item 1(a).          Name of Issuer.
                     -------------- 

      Superconductor Technologies, Inc.


 Item 1(b).          Address of Issuer's Principal Executive
                     ---------------------------------------
                     Offices.
                     --------

      460 Ward Street, Suite F
      Santa Barbara, CA 93111-2310


 Item 2(a).          Name of Person Filing.
                     --------------------- 

      Lockheed Martin Corporation ("Lockheed Martin")
      as successor in interest to
      Lockheed Corporation which has merged with and into
      Lockheed Martin effective January 28, 1996.

 Item 2(b).          Address of Principal Business Office.
                     ------------------------------------ 

      6801 Rockledge Drive,
      Bethesda, Maryland 20817


 Item 2(c).          Citizenship.
                     ----------- 

      Maryland


 Item 2(d).          Title of Class of Securities.
                     ---------------------------- 

      Common Stock


 Item 2(e).          CUSIP Number.
                     ------------ 

      867931107

                                       3

 
 Item 3.

      This Schedule is not filed pursuant to Rules 13d-1(b), or 13d-2(b).


 Item 4(a).          Amount Beneficially Owned.
                     ------------------------- 

      619,047

 Item 4(b).          Percent of Class.
                     ---------------- 

      10%


 Item 4(c).          Number of Shares as to Which Such Person Has:
                     -------------------------------------------- 

      (i) sole power to vote or to direct the vote:

      619,047
 
      (ii) shared power to vote or to direct the vote:
 
      0

      (iii) sole power to dispose of or direct the disposition of:

      619,047

      (iv) shared power to dispose of or direct the disposition of:

      0


 Item 5.             Ownership of Five Percent or Less of a Class.
                     -------------------------------------------- 

      Not applicable.


 Item 6.             Ownership of More than Five Percent on Behalf   
                     ---------------------------------------------
                     of Another Person.
                     ----------------- 

      Not applicable.

                                       4

 
 Item 7.             Identification and Classification of the 
                     ----------------------------------------
                     Subsidiary Which Acquired the Security Being
                     --------------------------------------------
                     Reported on By the Parent Holding Company.
                     -----------------------------------------
      Not applicable.


 Item 8.             Identification and Classification of Members of
                     -----------------------------------------------
                     the Group.
                     ---------
      Not applicable.


 Item 9.             Notice of Dissolution of Group.
                     ------------------------------ 

      Not applicable.


 Item 10.            Certification.
                     ------------- 

             By signing below I certify that, to the best of my knowledge and
           belief, the securities referred to above were acquired in the
           ordinary course of business and were not acquired for the purpose of
           and do not have the effect of changing or influencing the control of
           the issuer of such securities and were not acquired in connection
           with or as a participant in any transaction having such purposes or
           effect.



                                   SIGNATURE

             After reasonable inquiry and to the best of my knowledge and
           belief, I certify that the information set forth in this statement is
           true, complete and correct.

                                          LOCKHEED MARTIN CORPORATION


                                          By: /s/ Stephen M. Piper
                                             -------------------------
                                             Stephen M. Piper
                                             Assistant General Counsel
                                             and Assistant Secretary
                                  
                                             Dated: February 14, 1996
                                        





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